Lorigan J G, Shirkhoda A, Dexeus F H
Department of Diagnostic Radiology, University of Texas M. D. Anderson Cancer Center, Houston.
Urol Radiol. 1989;11(2):113-7. doi: 10.1007/BF02926490.
Preoperative localization of the impalpable undescended testis is necessary to facilitate proper surgical planning. There is an increased incidence of malignant change in the undescended testis; demonstration of malignancy before surgery will significantly alter the treatment. We describe the computed tomographic (CT) and magnetic resonance (MR) findings in 2 patients with malignant change in an intraabdominal testis. The CT scan revealed lesions with areas of low density, 1 of which had focal calcifications; MR revealed lesions of predominantly low or intermediate signal intensity on both long and short TR/TE images, with some areas of very high signal on both sequences. After initial management with chemotherapy, the residual tumor was surgically resected. In neither instance was residual normal testis demonstrated. Both CT and MR are ideal methods of examining malignant transformation of the undescended testis, because of their ability to characterize the internal structure of the organ and, in the case of MR, its capacity for multiplanar imaging. They are almost of equal value except for the ability of CT to identify calcification and of MR to diagnose hemorrhage.
术前对无法触及的隐睾进行定位对于制定恰当的手术方案很有必要。隐睾发生恶变的几率增加；术前证实恶变将显著改变治疗方式。我们描述了2例腹腔内隐睾发生恶变患者的计算机断层扫描（CT）和磁共振（MR）表现。CT扫描显示病变呈低密度区，其中1例有局灶性钙化；MR显示在长TR/TE和短TR/TE图像上病变主要呈低或中等信号强度，在两个序列上均有一些区域呈非常高的信号。经过化疗初始治疗后，残余肿瘤通过手术切除。在这两例中均未显示残留的正常睾丸组织。CT和MR都是检查隐睾恶变的理想方法，因为它们能够显示器官的内部结构，对于MR而言，还具备多平面成像的能力。它们几乎具有同等价值，只是CT能够识别钙化，而MR能够诊断出血。
